Description

DESCRIPTION

The engine has 4 opposed cylinders, double camshaft for each cylinder head, four valves per cylinder controlled by hydraulic tappets, BOSCH M2.10.3 multi-point electronic injection and static ignition controlled by a single control unit.

The clutch - gearbox - differential unit is connected behind the engine and forms an integral part of the power unit.

The latter is front mounted and set longitudinally with a 3° inclination.

The power unit is fastened to the body by "suspension" type mounts through a support frame connected to the gearbox - differential unit.

"he various connections of the power unit to the support frame are made with appropriate flexible mounts to absorb engine vibrations.

The fuel supply system, with unleaded petrol, combined with the suitable antipollution systems described in the specific paragraphs, ensure low exhaust emission levels meeting "USA 83" regulations.

CRANKCASE

This is a single cast iron block with high mechanical strength.

The crankshaft is supported by 3 main bearings which house the same number of thin-walled half bearings. The cylinders are machined directly in the crankcase and they are selected in five classes of dimensions. If cylinder wear exceeds the specified values, they must be bored to the specified diameters according to the oversizes of the pistons available from Spares (see CPT).

CYLINDER HEADS

This is one-piece, compact and chill-cast in aluminium and silicium alloy.

The four valves per cylinder are fitted in their guides arranged in a "V" of ~ 41° and they are controlled by two camshafts through hydraulic tappets.

Special grooves machined in the crankcase walls allow the circulation of coolant fluid and lubricating oil.

Oil spray jets installed on the front and centre main bearing caps spray oil on the piston crowns to partially cool them.